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Questions tagged [kundera]

Kundera is a JPA 2.1-compliant object-datastore mapping library for NoSQL datastores.

The idea behind Kundera is to make working with NoSQL databases drop-dead simple and fun. Kundera is being developed with following objectives:

  1. To make working with NoSQL as simple as working with SQL
  2. To serve as JPA-compliant mapping solution for NoSQL datastores.
  3. To help developers, forget the complexity of NoSQL stores and focus on the domain model.
  4. To make switching across data-stores as easy as changing a configuration.

Project Location: https://github.com/impetus-opensource/Kundera

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How to use two ORM in same project [Play Framework]

I am using Play framework. Can I use two ORM in the same project? I am already using Ebean and now want to use Kundera for a Cassandra purpose.
SR230
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Using kundera as database driver for spring gives error

I'm trying to use Kundera for accessing the database for my app (mongodb). However I'm getting an error: Cannot determine embedded database driver class for database type NONE when starting it. What am I required to set in order to be able to use…
v_johan
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Regarding Kundera and Cassandra ThriftClient

We using Kundera ORM for connecting to Cassandra from REST service. In the persistence.xml we are specifying client lookup class as ThriftClientFactory as below
Raj
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Kundera with Datastax DS-Driver complains "field" is not a field defined in UDT

I'm using Kundera-Cassandra with Kundera-Cassandra-ds-driver, both with version 3.7. H have an nested object structure to be persisted into Cassandra. The object is persisted correctly and find() returns the correct result. However, when running…
FrankC
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Hbase Kundera Table with namespace not working

Using Kundera I wanted to create Tables in Given NameSpace example foo:bar where foo is namespace & bar is tablename This is not happening with below configuration Here is my persistent Unit …
Ashish
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Tomee startup error with Kundera

I am trying to use Kundera with Tomee. After giving Kundera dependency I am getting below error. Nov 11, 2016 12:13:58 AM org.apache.catalina.core.ContainerBase removeChild SEVERE: ContainerBase.removeChild: destroy:…
Raj
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com.datastax.driver.core.exceptions.NoHostAvailableException:

I'm using Cassandra with Kundera that is installed on UBUNTU environment and I'm getting this Error: com.datastax.driver.core.exceptions.NoHostAvailableException: I'm using the DSClient Protocol…
Bruno Oliveira
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"[CompletionException: com.impetus.kundera.loader.MetamodelLoaderException: Error while retreiving and storing entity metadata]"

I'm new in cassandra, trying to integrate cassandra using Kundera 3.5 with my java app on play framework(v2.3). I have gone through this documentation. but I'm getting this error. [CompletionException:…
Noor Ahmed
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Kundera-Cassandra Failing to Map Compund Keys for Entities with MappedSuperClass

I'm working on mapping two tables with minimal differences in Cassandra, however Kundera is failing to map my model correctly (I have it configured to validate mappings against tables on EntityManager creation). Given the following compound key…
Brandon McKenzie
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JPA: One Table with Two different databases

I want to store my table in two different databases, (for example: HyperSQL and MYSQL), but I can't duplicate table annotation like this: @Entity(name="users") @Table(name = "users", schema = "Users@HyperSQL_pu") @Table(name = "users", schema =…
h.zak
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Kundera Unconfigured ColumnFamily despite ColumnFamily existing

I am trying to write logging records to a table over the course of a job. Unfortunately, despite the fact that the table exists (confirmed by querying the table using a JDBC client), Kundera does not believe it exists,…
Brandon McKenzie
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Optimistic locking with Kundera JPA

I'm trying to use Kundera as a JPA implementation over cassandra (namely for the transaction management capabilities). 2 questions: FIRST QUESTION is it true that transaction management does not support native queries? i.e. if I…
asafd
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Error while retrieving data, Caused by: . org.apache.cassandra.serializers.MarshalException

I have a table in cassandra which has a column of type List, When I try to read a row from this table, I see that there is some issue while reading column of list type as below: 27296 [Thread-15-localhostAMQPbolt0-executor[2 2]] INFO …
h.zak
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OneToMany relationship not working

I want to create a relationship between my sensor class with pieces class using kundera as a framework and cassandra as my database: what Im trying to do is: each sensor is associate to many pieces : sensor 1____0 * pieces but after doing this…
h.zak
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InvalidRequestException(why:line 1:184 mismatched character ')' expecting '-')

when I tried to save a table to cassandra using persist() method and kundera framework, i receive the error: 18976 [Thread-15-localhostAMQPbolt0-executor[2 2]] INFO c.i.c.c.CassandraClientBase - Returning cql query INSERT INTO…
h.zak
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